ISSN:
1022-1352
Schlagwort(e):
Chemistry
;
Polymer and Materials Science
Quelle:
Wiley InterScience Backfile Collection 1832-2000
Thema:
Chemie und Pharmazie
,
Physik
Notizen:
Star polymer formation by sequential anionic copolymerization of styrene and divinylbenzene in a non-polar solvent (benzene) was re-examined. Kinetic investigations established that the core formation is rather slow. Moreover, once the star molecules have reached their plateau molar mass, their cores still contain residual pendant unsaturations. This result arose from UV spectroscopic determinations, and was checked by sec-butyllithium addition to the star polymer solution. Fractionation experiments confirmed the rather narrow molar mass distribution in star polymer samples obtained by this arm-first process.
Zusätzliches Material:
3 Ill.
Materialart:
Digitale Medien
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